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INCOME TAXES, COMPONENTS OF INCOME TAX PROVISION (BENEFIT) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Current
Federal	$ 37,904	$ 12,248	$ 14,983
State	11,096	1,763	4,025
Deferred
Federal	24,963	34,127	18,757
State	960	6,186	4,361
Investment tax credits	(23,083)	(18,749)	(34,397)
Income tax provision	$ 51,840	$ 35,575	$ 7,729

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.